Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 781 946
2) Placement test : grammar for beginners (anonyme) 5 998 399
3) A/AN (webmaster) 5 369 108
4) Auxiliary BE (webmaster) 3 226 139
5) Present continuous (webmaster) 3 001 782
6) Present simple (webmaster) 2 921 568
7) Present simple (webmaster) 2 599 680
8) Present continuous (webmaster) 2 438 505
9) Adjectives (webmaster) 2 094 781
10) A/an (anonyme) 2 017 484
11) Present perfect simple (webmaster) 1 647 639
12) Preterite (webmaster) 1 633 550
13) Vocabulary - Placement test (bridg) 1 620 329
14) Preterite (webmaster) 1 450 944
15) Short placement test (webmaster) 1 444 535
16) To be (bridg) 1 407 403
17) What time is it? (webmaster) 1 350 557
18) Present perfect (webmaster) 1 349 635
19) The alphabet in English (webmaster) 1 322 229
20) Adjectives (anonyme) 1 217 067
21) What time is it? (webmaster) 1 210 489
22) Numbers (webmaster) 1 189 277
23) 'A' ou 'An' (anonyme) 1 177 084
24) Two presents: present continuous, present simple (webmaster) 1 150 782
25) To be (bridg) 1 146 508
26) Comparatives / Superlatives (webmaster) 1 107 796
27) Numbers (webmaster) 1 071 812
28) CAN / MUST (webmaster) 1 059 507
29) THE/ A / AN / nothing (webmaster) 1 035 528
30) Comparatives (webmaster) 1 008 067
31) Family life (bridg) 1 001 809
32) Numbers > 100 (webmaster) 987 246
33) Future (going to/will/present continuous) (anonyme) 965 540
34) Plural (webmaster) 956 661
35) Superlatives (webmaster) 876 095
36) Adjectives (anonyme) 875 605
37) Simple present (bridg) 854 966
38) Spelled words N°1 (bridg) 851 022
39) Placement test beginners: Check your spelling (anonyme) 830 569
40) Introducing oneself (webmaster) 827 731
41) Adverbs of frequency (anonyme) 818 784
42) Family (bridg) 785 538
43) General test-End of high school / Beginning of university (webmaster) 783 665
44) Present simple (anonyme) 782 666
45) Frequency adverbs (webmaster) 778 436
46) Present BE + Ving (bridg) 766 384
47) Passive form (anonyme) 727 333
48) Genitive (webmaster) 724 287
49) Family tree (anonyme) 720 066
50) Preterite: simple or continuous? (webmaster) 717 791
51) Placement test (beginners) (lili73) 702 137
52) Past simple or present perfect (anonyme) 696 256
53) Future (webmaster) 676 523
54) Present perfect simple (bridg) 663 292
55) 2 Preterites (webmaster) 663 199
56) Preterite (webmaster) 621 998
57) List of 200 irregular verbs and audio (bridg) 616 995
58) Modals (webmaster) 613 275
59) Spelled words N°2 (bridg) 609 860
60) Modals (webmaster) 607 111
61) Height (webmaster) 606 800
62) Articles a / an / the (anonyme) 596 779
63) Plural forms (bridg) 578 248
64) Nationalities (webmaster) 574 809
65) Past continuous / Past simple (anonyme) 568 358
66) Irregular plurals (bridg) 554 333
67) Two presents: simple and continuous (webmaster) 550 294
68) Preterite (bridg) 549 712
69) Superlatives (frapedur) 540 846
70) Vocabulary: greeting people (here4u) 536 555
71) Give your opinion (bridg) 532 606
72) Adverbs of Frequency (bridg) 517 481
73) Present simple or continuous (anonyme) 512 742
74) Present perfect / preterite ? (anonyme) 511 344
75) Possessive case (anonyme) 481 208
76) Countries & nationalities (bridg) 474 059
77) Past tenses (bridg) 471 737
78) 'The' or nothing? (webmaster) 471 663
79) Introducing oneself (easy) (webmaster) 471 108
80) Passive voice (webmaster) 464 349
81) Present Simple vs. Past Simple (anonyme) 459 450
82) Questions : how to ask them (anonyme) 448 926
83) General Test II / End of high school / Beginning of universi (webmaster) 446 624
84) IN, ON, AT or TO? (webmaster) 445 964
85) Relative pronouns (webmaster) 445 400
86) Comparative of superiority (anonyme) 439 888
87) How to pronounce the final -ED? (past simple) (webmaster) 438 941
88) Relative clauses (webmaster) 423 912
89) Sounds: [h] (webmaster) 419 852
90) Comparative (anonyme) 414 844
91) A/an/Ø (bridg) 399 393
92) Past simple (anonyme) 399 168
93) Future simple (anonyme) 397 249
94) This / That / These / Those (webmaster) 392 942
95) Conditional (webmaster) 392 293
96) Passive voice (anonyme) 391 311
97) Comparing (webmaster) 388 384
98) Can / could/ may/ might (woodyrun) 380 265
99) Present perfect or past tense (anonyme) 378 561
100) Much, many, little and few (felin) 373 857
101) Personal pronouns (anonyme) 371 534
102) Preterite continuous (BE + -ING) (webmaster) 370 362
103) Genitive case (bridg) 368 663
104) Some, any, no, enough, too/too much/too many (webmaster) 368 528
105) Confusing words - Placement test (bridg) 364 853
106) Irregular verbs (webmaster) 364 213
107) Numbers from 1 to 10 (anonyme) 361 857
108) Past perfect simple, past perfect continuous (anonyme) 361 129
109) Present continuous or present simple (webmaster) 359 931
110) Present perfect or preterite? (anonyme) 358 101
111) Simple Past : regular verbs (anonyme) 354 055
112) Comparative Adjectives (bridg) 352 595
113) Who, Whom, Which, or Whose? (anonyme) 349 447
114) Past simple (video) (anonyme) 349 087
115) Past simple or past continuous (anonyme) 344 488
116) While / When (anonyme) 340 060
117) What time is it? (webmaster) 338 387
118) Modals (tinou) 336 943
119) Modal: may/might (anonyme) 334 506
120) Cardinal and ordinal numbers (anonyme) 329 041
121) The superlative (anonyme) 326 950
122) Possessive adjectives and pronouns (woodyrun) 324 788
123) How to talk about the weather (lili73) 320 931
124) Since and for (anonyme) 319 385
125) Flags (webmaster) 317 903
126) Irregular verbs (bridg) 316 453
127) Pronouns (woodyrun) 314 808
128) Prepositions - in, on, at (anonyme) 314 419
129) Tenses (anonyme) 312 627
130) Placement test 3 (webmaster) 310 809
131) Order of adjectives (webmaster) 306 893
132) Could/Couldn't (laure95) 306 427
133) Comparative (anonyme) 305 032
134) Adjectives and prepositions (anonyme) 304 403
135) Agreement Tags (webmaster) 304 332
136) Asking questions (webmaster) 303 519
137) Present perfect OR simple past? (bridg) 298 694
138) Questions in the past tense (anonyme) 298 019
139) Uncountable nouns (webmaster) 296 271
140) Superlative Adjectives (bridg) 296 170
141) Object pronouns (bridg) 295 733
142) Placement test 1 (anonyme) 293 127
143) Passive form (anonyme) 292 597
144) Present simple (anonyme) 291 764
145) Can/Must/Should (laure95) 290 680
146) Prefer/rather (bridg) 289 842
147) Past perfect (lili73) 289 500
148) Must or Have to? (woodyrun) 288 028
149) The/an/nothing (bridg) 285 605
150) To be (anonyme) 283 588
151) Can and can't (laure95) 282 305
152) Vocabulary: asking and answering (here4u) 280 483
153) Modal verbs (bridg) 277 533
154) Some / Any / no... (bridg) 274 526
155) Days of the week (bridg) 269 163
156) So / neither (anonyme) 264 523
157) Past simple (video) (anonyme) 263 976
158) Present continuous (chnawa) 261 225
159) Used to (bridg) 260 512
160) Should / must (anonyme) 260 039
161) Past tense (anonyme) 259 603
162) Vocabulary: on the phone (here4u) 258 799
163) Find out a quantity (webmaster) 258 700
164) Articles : a / an / the / Ø (anonyme) 257 838
165) Superlative + and adjective (anonyme) 257 629
166) Comparative and superlative (anonyme) 256 366
167) Numbers 1/100 (anonyme) 253 842
168) Modal can (video) (anonyme) 253 218
169) Comparatives (anonyme) 249 826
170) Relatives pronouns (who, which, that...) (anonyme) 247 874
171) A few, a little, few, little (anonyme) 246 065
172) Vocabulary: at the restaurant (here4u) 245 694
173) Would rather / would prefer to (anonyme) 244 645
174) Present continuous and the Going to form (anonyme) 243 084
175) Should/ have to/ must (anonyme) 240 671
176) Have something done (anonyme) 240 050
177) Used to/would (woodyrun) 238 001
178) The past (webmaster) 237 954
179) Future continuous and future perfect. (felin) 237 916
180) How to ask a question in English (bridg) 235 833
181) Pluperfect (webmaster) 234 293
182) I wish, if only (felin) 234 272
183) Countable or Uncountable? (webmaster) 233 568
184) Some / any (younes91) 233 464
185) Should / shouldn't (anonyme) 231 807
186) Present simple or continuous (bridg) 230 812
187) Adjectives - ing and ed (felin) 229 354
188) Hypothesis (webmaster) 228 475
189) Auxiliary BE (anonyme) 226 562
190) Articles a/an/the/0 (bridg) 226 408
191) Must or mustn't (laure95) 226 280
192) Article The or nothing (anonyme) 226 189
193) Present perfect with Ever - never - (anonyme) 226 019
194) Present continuous OR Present simple? (bridg) 225 635
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 223 057
196) To / in order to / so as to / so that (irish21) 220 812
197) Comparison (komiks) 220 082
198) Present perfect (bridg) 219 683
199) What time is it ? (anonyme) 217 812
200) Indirect speech (bridg) 217 271
