Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 776 665
2) Placement test : grammar for beginners (anonyme) 5 988 811
3) A/AN (webmaster) 5 363 367
4) Auxiliary BE (webmaster) 3 223 343
5) Present continuous (webmaster) 2 998 162
6) Present simple (webmaster) 2 910 939
7) Present simple (webmaster) 2 596 381
8) Present continuous (webmaster) 2 432 372
9) Adjectives (webmaster) 2 093 016
10) A/an (anonyme) 2 014 376
11) Present perfect simple (webmaster) 1 641 313
12) Preterite (webmaster) 1 625 541
13) Vocabulary - Placement test (bridg) 1 618 758
14) Preterite (webmaster) 1 445 828
15) Short placement test (webmaster) 1 443 190
16) To be (bridg) 1 405 717
17) What time is it? (webmaster) 1 348 708
18) Present perfect (webmaster) 1 344 519
19) The alphabet in English (webmaster) 1 320 560
20) Adjectives (anonyme) 1 215 408
21) What time is it? (webmaster) 1 207 326
22) Numbers (webmaster) 1 188 309
23) 'A' ou 'An' (anonyme) 1 174 790
24) Two presents: present continuous, present simple (webmaster) 1 148 730
25) To be (bridg) 1 145 095
26) Comparatives / Superlatives (webmaster) 1 102 355
27) Numbers (webmaster) 1 070 358
28) CAN / MUST (webmaster) 1 058 153
29) THE/ A / AN / nothing (webmaster) 1 032 681
30) Comparatives (webmaster) 1 006 826
31) Family life (bridg) 1 000 381
32) Numbers > 100 (webmaster) 986 072
33) Future (going to/will/present continuous) (anonyme) 963 190
34) Plural (webmaster) 955 408
35) Superlatives (webmaster) 874 805
36) Adjectives (anonyme) 874 441
37) Simple present (bridg) 853 413
38) Spelled words N°1 (bridg) 849 810
39) Placement test beginners: Check your spelling (anonyme) 829 895
40) Introducing oneself (webmaster) 826 967
41) Adverbs of frequency (anonyme) 816 737
42) Family (bridg) 784 413
43) General test-End of high school / Beginning of university (webmaster) 782 459
44) Present simple (anonyme) 779 542
45) Frequency adverbs (webmaster) 777 499
46) Present BE + Ving (bridg) 764 648
47) Genitive (webmaster) 723 321
48) Family tree (anonyme) 719 120
49) Passive form (anonyme) 719 056
50) Preterite: simple or continuous? (webmaster) 716 116
51) Placement test (beginners) (lili73) 700 661
52) Past simple or present perfect (anonyme) 693 142
53) Future (webmaster) 675 647
54) 2 Preterites (webmaster) 661 560
55) Present perfect simple (bridg) 659 724
56) Preterite (webmaster) 619 852
57) List of 200 irregular verbs and audio (bridg) 615 697
58) Modals (webmaster) 612 469
59) Spelled words N°2 (bridg) 608 917
60) Height (webmaster) 606 155
61) Modals (webmaster) 604 682
62) Articles a / an / the (anonyme) 596 747
63) Plural forms (bridg) 577 138
64) Nationalities (webmaster) 574 022
65) Past continuous / Past simple (anonyme) 565 394
66) Irregular plurals (bridg) 553 350
67) Two presents: simple and continuous (webmaster) 549 313
68) Preterite (bridg) 548 682
69) Superlatives (frapedur) 537 588
70) Vocabulary: greeting people (here4u) 536 443
71) Give your opinion (bridg) 531 690
72) Adverbs of Frequency (bridg) 516 767
73) Present simple or continuous (anonyme) 509 986
74) Present perfect / preterite ? (anonyme) 508 545
75) Possessive case (anonyme) 480 337
76) Countries & nationalities (bridg) 473 199
77) 'The' or nothing? (webmaster) 471 076
78) Introducing oneself (easy) (webmaster) 470 579
79) Past tenses (bridg) 470 450
80) Passive voice (webmaster) 462 706
81) Present Simple vs. Past Simple (anonyme) 456 275
82) Questions : how to ask them (anonyme) 448 028
83) General Test II / End of high school / Beginning of universi (webmaster) 445 976
84) IN, ON, AT or TO? (webmaster) 444 818
85) Relative pronouns (webmaster) 444 030
86) Comparative of superiority (anonyme) 438 092
87) How to pronounce the final -ED? (past simple) (webmaster) 437 174
88) Relative clauses (webmaster) 423 043
89) Sounds: [h] (webmaster) 419 375
90) Comparative (anonyme) 413 072
91) A/an/Ø (bridg) 398 461
92) Past simple (anonyme) 396 002
93) Future simple (anonyme) 395 984
94) This / That / These / Those (webmaster) 392 340
95) Conditional (webmaster) 391 397
96) Passive voice (anonyme) 390 140
97) Comparing (webmaster) 387 862
98) Can / could/ may/ might (woodyrun) 379 132
99) Present perfect or past tense (anonyme) 376 734
100) Much, many, little and few (felin) 372 297
101) Personal pronouns (anonyme) 371 230
102) Preterite continuous (BE + -ING) (webmaster) 368 659
103) Some, any, no, enough, too/too much/too many (webmaster) 367 973
104) Genitive case (bridg) 367 748
105) Confusing words - Placement test (bridg) 364 463
106) Irregular verbs (webmaster) 363 361
107) Numbers from 1 to 10 (anonyme) 361 403
108) Past perfect simple, past perfect continuous (anonyme) 360 796
109) Present continuous or present simple (webmaster) 359 424
110) Present perfect or preterite? (anonyme) 356 278
111) Simple Past : regular verbs (anonyme) 352 462
112) Comparative Adjectives (bridg) 352 050
113) Who, Whom, Which, or Whose? (anonyme) 348 568
114) Past simple (video) (anonyme) 348 125
115) Past simple or past continuous (anonyme) 341 714
116) While / When (anonyme) 338 149
117) What time is it? (webmaster) 337 591
118) Modals (tinou) 336 356
119) Modal: may/might (anonyme) 334 027
120) Cardinal and ordinal numbers (anonyme) 328 573
121) The superlative (anonyme) 324 708
122) Possessive adjectives and pronouns (woodyrun) 323 991
123) How to talk about the weather (lili73) 320 864
124) Since and for (anonyme) 318 510
125) Flags (webmaster) 317 409
126) Irregular verbs (bridg) 315 828
127) Prepositions - in, on, at (anonyme) 313 996
128) Pronouns (woodyrun) 313 209
129) Tenses (anonyme) 311 685
130) Placement test 3 (webmaster) 310 288
131) Order of adjectives (webmaster) 306 441
132) Could/Couldn't (laure95) 305 676
133) Comparative (anonyme) 304 343
134) Adjectives and prepositions (anonyme) 303 934
135) Agreement Tags (webmaster) 303 909
136) Asking questions (webmaster) 302 959
137) Present perfect OR simple past? (bridg) 298 209
138) Questions in the past tense (anonyme) 297 366
139) Superlative Adjectives (bridg) 295 615
140) Uncountable nouns (webmaster) 295 471
141) Object pronouns (bridg) 294 555
142) Placement test 1 (anonyme) 292 584
143) Present simple (anonyme) 290 757
144) Passive form (anonyme) 290 191
145) Prefer/rather (bridg) 289 176
146) Can/Must/Should (laure95) 288 880
147) Past perfect (lili73) 287 379
148) Must or Have to? (woodyrun) 287 001
149) The/an/nothing (bridg) 285 012
150) To be (anonyme) 283 385
151) Can and can't (laure95) 280 601
152) Vocabulary: asking and answering (here4u) 280 432
153) Modal verbs (bridg) 277 139
154) Some / Any / no... (bridg) 270 275
155) Days of the week (bridg) 269 075
156) So / neither (anonyme) 264 247
157) Past simple (video) (anonyme) 263 562
158) Used to (bridg) 260 296
159) Present continuous (chnawa) 259 474
160) Should / must (anonyme) 259 385
161) Past tense (anonyme) 259 166
162) Vocabulary: on the phone (here4u) 258 713
163) Find out a quantity (webmaster) 258 489
164) Superlative + and adjective (anonyme) 257 051
165) Articles : a / an / the / Ø (anonyme) 256 155
166) Comparative and superlative (anonyme) 254 659
167) Numbers 1/100 (anonyme) 253 485
168) Modal can (video) (anonyme) 252 804
169) Relatives pronouns (who, which, that...) (anonyme) 247 814
170) Comparatives (anonyme) 246 735
171) Vocabulary: at the restaurant (here4u) 245 639
172) A few, a little, few, little (anonyme) 245 055
173) Would rather / would prefer to (anonyme) 244 166
174) Present continuous and the Going to form (anonyme) 242 388
175) Should/ have to/ must (anonyme) 239 694
176) Have something done (anonyme) 239 690
177) The past (webmaster) 237 720
178) Future continuous and future perfect. (felin) 237 472
179) Used to/would (woodyrun) 237 357
180) How to ask a question in English (bridg) 235 154
181) I wish, if only (felin) 233 958
182) Pluperfect (webmaster) 233 731
183) Countable or Uncountable? (webmaster) 233 029
184) Some / any (younes91) 232 309
185) Should / shouldn't (anonyme) 231 248
186) Present simple or continuous (bridg) 230 769
187) Adjectives - ing and ed (felin) 228 704
188) Hypothesis (webmaster) 227 981
189) Auxiliary BE (anonyme) 226 316
190) Articles a/an/the/0 (bridg) 226 135
191) Article The or nothing (anonyme) 225 810
192) Present perfect with Ever - never - (anonyme) 225 373
193) Present continuous OR Present simple? (bridg) 225 270
194) Must or mustn't (laure95) 225 075
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 693
196) To / in order to / so as to / so that (irish21) 219 778
197) Present perfect (bridg) 219 356
198) Comparison (komiks) 217 719
199) What time is it ? (anonyme) 217 569
200) Indirect speech (bridg) 216 242
